Mega Code Archive
Working with File Filters
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import java.io.File;
import javax.swing.JFileChooser;
import javax.swing.filechooser.FileFilter;
class ExtensionFileFilter extends FileFilter {
String description;
String extensions[];
public ExtensionFileFilter(String description, String extension) {
this(description, new String[] { extension });
}
public ExtensionFileFilter(String description, String extensions[]) {
if (description == null) {
this.description = extensions[0] + "{ " + extensions.length + "} ";
} else {
this.description = description;
}
this.extensions = (String[]) extensions.clone();
toLower(this.extensions);
}
private void toLower(String array[]) {
for (int i = 0, n = array.length; i < n; i++) {
array[i] = array[i].toLowerCase();
}
}
public String getDescription() {
return description;
}
public boolean accept(File file) {
if (file.isDirectory()) {
return true;
} else {
String path = file.getAbsolutePath().toLowerCase();
for (int i = 0, n = extensions.length; i < n; i++) {
String extension = extensions[i];
if ((path.endsWith(extension) && (path.charAt(path.length() - extension.length() - 1)) == '.')) {
return true;
}
}
}
return false;
}
}
public class JFileChooserWithCustomizedFilter {
public static void main(String[] a) {
JFileChooser fileChooser = new JFileChooser(".");
FileFilter jpegFilter = new ExtensionFileFilter(null, new String[] { "JPG", "JPEG" });
fileChooser.addChoosableFileFilter(jpegFilter);
fileChooser.showOpenDialog(null);
}
}
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